package com.ktjiaoyu.controller;

import jakarta.servlet.http.HttpServletRequest;
import jakarta.servlet.http.HttpSession;
import org.springframework.web.context.request.RequestContextHolder;
import org.springframework.web.context.request.ServletRequestAttributes;
import org.springframework.web.servlet.view.UrlBasedViewResolver;


public class BaseController {
    //转发到任意路劲
    public String forward(String path){
        return UrlBasedViewResolver.FORWARD_URL_PREFIX+path;
    }
    //重定向到任意路劲
    public String redirect(String path){
        return UrlBasedViewResolver.REDIRECT_URL_PREFIX+path;
    }
    //获取request对象
    public HttpServletRequest request(){
        return ((ServletRequestAttributes) RequestContextHolder.getRequestAttributes()).getRequest();
    }
    //设置数据到request作用域中
    public void request(String name,Object obj){
        request().setAttribute(name,obj);
    }
    //从request作用域中获取数据
    public <T> T request(String name){
        return (T)request().getAttribute(name);
    }
    //获取session对象
    public HttpSession session(){
        return request().getSession();
    }
    //设置数据到session作用域中
    public void session(String name,Object obj){
        session().setAttribute(name,obj);
    }
    //从session作用域中获取数据
    public <T> T session(String name){
        return (T)session().getAttribute(name);
    }
}
